地球自转、断层形变与地震活动关系研究
|
摘要
对地球自转、断层形变和地震活动三者各自的活动性规律进行了比较,对三者之间的相关性进行了分析,得出了几点新的认识1)地球自转速度变化与地壳形变相关,近30年来存在准10年周期的变化,但相关成分在总的形变信息中比重很小,呈弱相关;2)地球自转速度变慢、日长变长、华北地震活跃,据此认为目前华北处于非强震活动期;3)强震中短期前兆在形变资料中有较好的显示,但在地球自转资料中不会出现特定地震的中短期前兆异常;4)地球自转速度变化与地壳形变可能是同源关系,而不是从属关系,有互补性;5)华北最近的两个地震活动高潮期与地球自转变化的10年以上周期相关,认为地震活动与地球自转变化有关系,但不同区域会有不同的对应关系。同样是地球自转速度变慢,因不同区域地壳与地幔的耦合关系不一样,速度变化对不同区域地壳活动的影响也不同。
The variations of earth rotation, fault deformation and seismicity have been studied and the relations among them are analyzed. Some new results are given here: 1) The variation of the earth rotation speed is correlated with the crust deformation. There is an approximately 10-year period variation in recent 30 years, but the correlative component between them in the whole deformation is small, showing a weak relation; 2)When the speed of earth rotation is slowing, the length of day is lengthening, and the earthquakes in North China are active.Consequantly, it is not a seismicity period in North China at present; 3)The medium-and short-term precursor can be shown in fault deformation data, but it can’t be shown in the earth rotation data for a certain earthquake. 4) The relationship between the earth rotation and the deformation is an isogenous, not a consequent, and they compensat each other. 5) In North China, the recent two seismicity periods are correlated with the 10-year or longer period of the earth rotational variation, so there is a certain relation between seismicity and the earth rotation in this region, but the relations are different in different area. Because the couplings between crust and the earth mantle are different in different region, the same variation of earth rotation must induce different crust activities.
The variations of earth rotation, fault deformation and seismicity have been studied and the relations among them are analyzed. Some new results are given here: 1) The variation of the earth rotation speed is correlated with the crust deformation. There is an approximately 10-year period variation in recent 30 years, but the correlative component between them in the whole deformation is small, showing a weak relation; 2)When the speed of earth rotation is slowing, the length of day is lengthening, and the earthquakes in North China are active.Consequantly, it is not a seismicity period in North China at present; 3)The medium-and short-term precursor can be shown in fault deformation data, but it can’t be shown in the earth rotation data for a certain earthquake. 4) The relationship between the earth rotation and the deformation is an isogenous, not a consequent, and they compensat each other. 5) In North China, the recent two seismicity periods are correlated with the 10-year or longer period of the earth rotational variation, so there is a certain relation between seismicity and the earth rotation in this region, but the relations are different in different area. Because the couplings between crust and the earth mantle are different in different region, the same variation of earth rotation must induce different crust activities.
引文
1 薄万举,杨国华,郭良迁,等.地壳形变与地震预测研究[M].北京:地震出版社,2001.
1 Bo Wanju,Yang Guohua,Guo Liangqian,et al.Researches on crust deformation and earthquake prediction[M].Bei-jing:Seismological Press,2001.(in Chinese)
2 王庆良,崔笃信,王文萍,等.地球自转日长变化与地壳形变及应力相关性——地球动力学及地震预报意义[A].中国地震学会成立20周年纪念文集[C].北京:地震出版社,1999.
2 Wang Qingliang,Cui Duxin,Wang Wenping,et al.The relativity between the length of earth rotational period,the crustal deformation and stress;the significance of earth dy-namics and earthquake prediction[A].Selected papers for the20th anniversary of China Seismological Society[C].Beijing:Seismological Press,1999.
3 Wang Qingliang,Chen Yuntai,Cui Duxin,et al.Decadal correlation between crustal deformation and variation in length of day of the earth[J].Earth Planets Space,2000,52:989-992.
4 Wang Q L,Chen Y T,Cui D X,et al.Decade-scale correla-tion between crustal deformation and length of day:implica-tion to earthquake hazard estimation[C].Earthquake Haz-ard,Risk,and Strong Ground Motion[a].edited by Chen Y T,G F Panda and Z L Wu,Beijing:Seismological Press,2004.
5 刘忠书,等.地球自转与八十年代中国的大震活动趋势[J].地壳形变与地震,1982,2(3):74~82.
5 Liu Zhongshu,et al.Earth’s rotation and strong earthquake’s activity trend of China in1980’s[J].Crustal Deformation and Earthquake,1982,2(3):74-82.(in Chinese)
6 薄万举,刘祥海.跨断层测量显示的地壳活动阶段性特征[J].地壳形变与地震,1998,18(增刊):113~116.
6 Bo Wanju and Liu Xianghai.The staggered characteristics of crust activity shown by the measurement of fault deformation[J].Crust Deformation and Earthquake,1998,18(Sup.):113-116(in Chinese)
7 薄万举,华彩虹.地形变强震指标探讨[J].地震,2001,21(1):22~25.
7 Bo Wanju and Hua Caihong.Research and discussion on strong earthquake index shown by crust deformation data[J].Earthquake.2001,21(1):22-25.(in Chinese)
8 薄万举,吴翼麟.信息合成方法及其应用的研究[J].地壳形变与地震,1995,V15(3):84~88.
8 Bo Wanju and Wu Yilin.Researches on method of informa-tion synthesis and it's application[J].Crust Deformation and Earthquake.1995,15(3):84-88.(in Chinese)
1 Bo Wanju,Yang Guohua,Guo Liangqian,et al.Researches on crust deformation and earthquake prediction[M].Bei-jing:Seismological Press,2001.(in Chinese)
2 王庆良,崔笃信,王文萍,等.地球自转日长变化与地壳形变及应力相关性——地球动力学及地震预报意义[A].中国地震学会成立20周年纪念文集[C].北京:地震出版社,1999.
2 Wang Qingliang,Cui Duxin,Wang Wenping,et al.The relativity between the length of earth rotational period,the crustal deformation and stress;the significance of earth dy-namics and earthquake prediction[A].Selected papers for the20th anniversary of China Seismological Society[C].Beijing:Seismological Press,1999.
3 Wang Qingliang,Chen Yuntai,Cui Duxin,et al.Decadal correlation between crustal deformation and variation in length of day of the earth[J].Earth Planets Space,2000,52:989-992.
4 Wang Q L,Chen Y T,Cui D X,et al.Decade-scale correla-tion between crustal deformation and length of day:implica-tion to earthquake hazard estimation[C].Earthquake Haz-ard,Risk,and Strong Ground Motion[a].edited by Chen Y T,G F Panda and Z L Wu,Beijing:Seismological Press,2004.
5 刘忠书,等.地球自转与八十年代中国的大震活动趋势[J].地壳形变与地震,1982,2(3):74~82.
5 Liu Zhongshu,et al.Earth’s rotation and strong earthquake’s activity trend of China in1980’s[J].Crustal Deformation and Earthquake,1982,2(3):74-82.(in Chinese)
6 薄万举,刘祥海.跨断层测量显示的地壳活动阶段性特征[J].地壳形变与地震,1998,18(增刊):113~116.
6 Bo Wanju and Liu Xianghai.The staggered characteristics of crust activity shown by the measurement of fault deformation[J].Crust Deformation and Earthquake,1998,18(Sup.):113-116(in Chinese)
7 薄万举,华彩虹.地形变强震指标探讨[J].地震,2001,21(1):22~25.
7 Bo Wanju and Hua Caihong.Research and discussion on strong earthquake index shown by crust deformation data[J].Earthquake.2001,21(1):22-25.(in Chinese)
8 薄万举,吴翼麟.信息合成方法及其应用的研究[J].地壳形变与地震,1995,V15(3):84~88.
8 Bo Wanju and Wu Yilin.Researches on method of informa-tion synthesis and it's application[J].Crust Deformation and Earthquake.1995,15(3):84-88.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心